update vendor dependencies for kubelet client

adding new imported package dependencies in vendor which is required
for Kubelet Pod Resource api client.

Change-Id: If6c74598e12af5f8659df69371e72dd064823f49
(cherry picked from commit 8ee7eb335e)

vendor/google.golang.org/grpc/test/codec_perf/perf.proto

@@ -0,0 +1,25 @@
+// Copyright 2017 gRPC authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Messages used for performance tests that may not reference grpc directly for
+// reasons of import cycles.
+syntax = "proto3";
+
+package codec.perf;
+
+// Buffer is a message that contains a body of bytes that is used to exercise
+// encoding and decoding overheads.
+message Buffer {
+  bytes body = 1;
+}